Socket 939 CPUs

I am looking to upgrade my gf's gaming PC which was my old one. I cant seem to find a socket 939 cpu faster than the 64 athalon x2 4400+ anywhere.. I see a lot of 3500 and 3000s, and they seem expensive.

Did they make anything higher for 939? Also, I see that they eventually switched the 4400+ to AM2 and AM2+. Weird?

Any help is appreciated! 😉